Lamp



E. A. HAWTHORNE LAMP.

APPLICATION FILED APR, 2' 1920.

Patentd May,9,1922.

16. 1917. for illuminating apparatus.

'ing the 1 UNITED TATES ELLSWQRTH A. HAWTHORNE, or na penroa'r, coirnae"rm1i'r,

- LAMP.

Specification of'Letters Patent;

Continuation of applications Serial No. 105,282, filed June 1916, and; renewed March I1,--191:8; Serial No. 219 869,'and Serial No. 149,883, filed February 16,1917. This application filed April' 2p1920.

' Serial No. 370,850. 7

T0 all whom it may concern:

Be it known that I. ELLswonTH A. HAW- 'rnonNn, a citizen of the Umted-St ates, and

a:res'ident of Bridgeport, in the county oi Fair-field and State of Connecticut, have invented an Improvement inLamps of which the following description, in connect on with the accompanying drawings is a speci- K =fira't1on, like characters on the V drawings representing like parts.

This application is a continuation of my co-pending cases Serial No. 2l9,869, a re-' newal on March 1. 1918, of an application,

Serial No. 105.282. filed June 2-2, 1916, for lamps and Serial No. 149.088.-filed Feb.

This inventionrelates to lamps and more particularly to lamps such asare used on vehicles and one of the purposes thereof is to provide such a lamp whichcan be readily brought to proper focus. 1

My invention will be best understood vl by -reference to the following description taken in connection with the accompanying drawings. wherein: f

Fig. lis a central vertical section partly broken away through a form 01 lamp which will serve as an illustrative embodiment of my invention; t v

Fig. 2 is a view on a larger scale of the lightwarrying member viewed from thetop of Fig. 1: i

I Fig. 3 is a section on line 3-3 of Fig. 2: Fig. i is a section on the line a lflof Fig. 1, but on alarger scale;

Fin". 5 is a view similar to Fig. l-showparts in a different condition of ad justment;

Fig. 6 is a plan view of-certain parts 'arlar to. those; they Fig. 7 is asection on the line 7-7 of Fig.

1 on the same scale as Figs. 2, a and 5; and

I 8 is a section through the light carrying member on a horizontal linelookiiig down I The'I-form of lamp which I have chosen as illustrated in my invention includes a vsuitali le, casing with an interiorreflecting surface and I have here shown an exterior casing- 1 and aseparate reflector-.3 within the same which may be and preferably is -01; parabolic form, The front of this casing may-be closed by a suitable bezel 5 and glazing 7 hereshown 3,501? the kind disthereo f.

. terior thereof, formsahofusing to receivesthe member :18 and v the clamping mechanism therefor and in the-present embodiment a part of this housing is extended rearwardly 1916. I here sho'w the lamp as cari vingfla a. small pilot light lldisposed atone side The main 'light' '9 iscmountedxin closed-in my Patent 1 .203,61S,TN0Vembei-I 7. 7

;main light 9 disposed centrally,thereinfand a light-carrying member 13-which may be provided, as shown. with. suitable bayonet slots 15 toreceive. pins 17? carried, bythe light. a 1 a The light-carrying member 13 as: shown, extends'rearwardly through the reflector-and preferably to'the exterior of thecasingl. Part of thecasing .1; presented to they exfrom the main part-of the jjcasing and may serve as a handle by which! the lamp may becarried and moved. The vmember 1391s of the :housing and may be provided exteri'orly with a switch handle or fingergrip To adjust-the light 9to proper focus the z 3 and the housingl9. To permit suchad- ;justment without occasioning rotary move-' ment of the member whlch would impose a- '75. shown as extending. through the reflector .and through a suitable aperture in the rear .light carrying member-may be shifted .lon-, gltudlnally in its'bea-rings 'inthe reflector strain on the connecting wires, the member l3 islocked against rotation preferably with the reflector in the manner shown." For this purpose the reflector. Which has an opening to receive the member 13, may have a sleeve.

., :23 extending rearwardly.therefrom into-the chamber formed between the; reflector and the exterior casing andithe material of this sleeve maybe extended atrits rear end to form theoppos'ed, inwardly bent lugs25 which are received, by slots 27 in .the inem ber 13. fOtherwise described itmight b'e'said thatthe'reflector presents an aperture "'toward jthe rear part- .ofthe casing and. that i the materialof the:- wall 501?. said I aperture is. ontinued as a lug projecting from the margin of the aperture toward the'i center thereof and that the light-carrying member fits the aperture with a"slot' f27 receiving t lu It will be apparent that by the construction described, the member 13 and the lamp 9 carried thereby can be adjusted longitudinally but will be held against rotary movement. This construction of the joint provides an extended bearing for the member 13 and permits a wide range of adjusting movement. The form of joint, moreover, can be readily constructed from sheet metal.

The adjustment of the light-carrying member may take place from the exterior of the casing by manipulation of the projecting end of the latter. To hold the same in its adjusted position I desirably provide means acting to jam the member in place in the housing 19. These means may take the form shown more particularly in Figs. 1, 1, 5 and 6. The means there shown takes the form of one or more clamping plates 29, two being shown, adapted to fit against the housing at one end and against the light-carrying member 13 at the other. If two plates are used, as in the present embodiment, they are preferably placed opposite one another. These plates are shown in plan view in 6 and by a comparison with Figs. 1 and 5, it will be seen that their length is greater than the width of the space between the member 13 and the interior surface of the housing.

They will therefore be disposed somewhat on a diagonal, as shown in Fig. 1, bracing apart the member 13 and the wall of the housing. Each of these plates 29 is tapped at 31 to receive the screw 33 entering the housing from the exterior thereof so that the plates 29 may be adjusted from the outside. It is apparent that if the screws 33 are turned the diagonal braces 29 will be tilted and act as jaws to grip the member 13 and hold it firmly against lateral movement by exerting a wedging force between the same and the housing 19. In Fig. 1 1 have shown the plates gripping part 13 and in Fig. 5 the screws have been manipulated so as to tilt the same away from part 13 and it is apparent that the latter is then released and can be easily moved backward and forward, guided by the lugs 25. If desired the plates may be adjusted in such a manner as to permit voluntary adjustment of the part 13 but so that they will bear upon it in the manner of brake shoes to prevent spontaneous movement] It will be noted that the two parts 29 act somewhat'as do the arms of a toggle joint and they might therefore be aptly called toggle arms.

While the toggle arms or gripping jaws 29 are entirely enclosed within the housing 19 and are protected by the same, they are readily accessible for manipulation from the exterior of the lamp by means of the screws 33. Their arrangement is such that they .take a vel'y'firm grip on the light-carrying member 13 and prevent its longitudinal movement and they are not easily deranged on account of the vibration of the vehicle on which the lamp is carried. Furthermore, since they are tightly wedged in place there will be no tendency for them to rattle as is the case with threaded devices. A The parts are very simple in construction and readily stamped out of sheet metal.

In the embodiment of the invention shown the light-carrying member 13 also serves as a switch socket and the two lights 9 and 11 may be selectively controlled by the handle 21 above described. In the drawing I have shown the duplex cable 35 extending through the exterior casing 1 and comprising the cable 37 leading to the switch and the ground cable 39. From the member 13 the cable ll extends to the pilot light 11. The finger grip 21 is herein shown as adapted to rotate a plug housed within the member 13 carrying an eccentrically mounted contact member 13 to which is connected the main feed cable 37. Rotative adjustment of the plug is adapted to bring the contact 43 into engagement either wlth the contact 45 for the main light 9 or the contact 47 with which 1s connected the cable 41 leading to auxiliary light 11.

An important feature of the construction shown is the ease with which it may be manipulated. For example, it be supposed that the lamp is used as a so-called spotlight or wind shield light on a vehicle. The finger grip or switch handle 21 provides a means whereby the driver can operate the light as he desires with the fingers of one hand, while the other is left free for controlling the movement of the vehicle. For this purpose the clamping means 29 may be set up so as to prevent too free movement of the lightcarrying member but to permit the same to be drawn longitudinally to adjust the focus. It will be noted that the finger grip 21 is permanently mounted in the end of the member 13, or in other words, is fixedly secured to the light socket so that no matter what its position of rotative adjustment it will still serve as a handle to alter the position of the bulb 9 along the reflector axis. The operator is thus enabled by grasping this finger grip to point the light in any direction he desires, to adjust the spread of the rays. and to turn the light on and off, all this being done with the fingers of one hand. Furthermore, in the embodiment shown the cable connects with the member 13 laterally in the space between the casing and reflector and therefore remote from the finger grip 21. Thus this grip is entirely unencumbered and the manipulation thereof is facilitated.

T have described in detail the embodiment of my invention here illustrated and in so doing have referred to the various parts by specific words. It will be understood, however, that l have done this in order that the structure shown "might be more readily understood and not with a defining purpose as the various details disclosed are not of the essence. I

What I do claim and desire to secure by Letters Patent is: I v

1. A. lamp-comprising, in combination, a casing embodying an interior reflecting surface and an exteriorly presented housing, a light within said casing and a light-carrying member therefor'extending through said housing and mounted for sliding movement whereby to focuse said light with'respect to said reflecting surface, and means to retain said member in adjusted position'comprising a member interposed as a diagonal brace between said light-carrying member and housing and a device for tilting said member. v r Y I 2. A lamp comprising, in combination, a casing embodying an interior reflecting surface and an exteriorly presented housing, a light within said casing and a lightcarrying member therefor extending through said housing and mounted for slidingmovement whereby to focus said light with. respect to said reflecting surface, and meansto retain said member in adjusted position comprising opposed toggle armsinterposed between said housing and said member-and means to adjust said arms. 1 I

3. A lamp comprising, in combination, a

casing embodying an interior reflecting surface and an exteriorly presented housing, a light within said casing and a light-carrying member therefor extending through said housing and mounted for sliding movement whereby to focus said light with respect to said reflecting surface, and means to retain said member in adjusted position comprising symmetrically disposed jaws supported by said housing and means accessible-from the exterior of the casing to force them against said member to grip the same.

4. A lamp comprising an exterior casing, a .housing extending rearwardly from the back thereof and forming a handle for the lamp, a reflector in said casing, a light-car-- rylng membermounted in said housing for non-rotary sliding movement whereby to adjust the focus of alight carried by said member, said member projecting from the rear of said housing for manipulation and means to jam said member into fixed position in said housing after adjustment thereof. 1

5. A lamp embodying aselements thereof an exterior casing-and an interior reflector a having aligned openings, a light-carrying member extending through said openings for sliding movement therein and interlocking against rotary movement with one of saidelements and means interposed between said member and said casing and adjustable to exert a Wedging force tending to move apart of said handle,

lamp, areflector in said casing, a light-car-v rying member disposed in said housing and extending through the reflector and the wall of the casing and joined to one-of thev same? for non-rotary sliding movement wherebyv to adjustthe focusof the light by rectilinear movement of the end of said member which 1 projects through the housing, and means interposed between said memberand the Wall of'the housing between the bearings of the a member in reflector and casing, and bearing against said member to hold it fixed against undesired sliding movement relatively to the wall. 1 7

7, In a lamp, the combination of a casing having a reflecting surface therein, a lamp-- focuslng and switch-operating handle mounted to turn and move lengthwise of i the axis of saidreflectorand presentede-xterio-rly of said casing, a light source within the casing, a supporting membertherefor also embodying a switch, and means toutilize turning movement of said handleto operate Said switch and to utilize length wisemovement of said handle to foous'said lamp 'in all positions of turning movement 8, A lamp embodying acasing having an interior reflector. alight-carrying member mounted for sliding movement in'said reflector but held against rotative movement therein, switch means carried by said member, and controlling. means fixedly secured to sa d member and embodying ,a -rotatable-,

switch-operating finger grip bodily-movable with said casin'g'and presented at the eX- 'terior thereof. I I j A; lamp embodying a cas ng having an interior reflecting surface, a llght-carrying member extending through the samev and mountedfor sliding but held against rotative vmovement therein, switch means carried.

by said member for controllingthe light and afinger grip at the'exterior end thereof pro-v viding means; for rectilinearly moving said member and being rotatable to control said switch means.

10. A lamp comprising acasing having an interior reflecting surface, ,alight source Within" the casing,v a handle presented exteriorly of the casing and connected to said light source to permit focusing: adjustment of the latter, electrical: connectionsentering said casing remote from the handleyan d switch means therefor under control of the handle for controlling the circuit to the light source, whereby a single unobstructed .han-

die. may serve for: manipulating-the-lamp and controlling and adjusting the light.

11. A lamp comprising a casing and an interior reflector defining a space between them, a member having bearings in casing and reflector and bridging said space, said member supporting at one end an electric bulb within the reflector and at its other end providing a finger grip exterior to the casing for manipulating the lamp, said grip providing means for moving said member in its bearings to focus the bulb, electric connections entering the space aforesaid and connected to said member and switch means carried by said member under control of said finger grip.

12. A structure as defined in claim 11 with an auxiliary electric bulb having connections to said member and the switch means selectively controlling the circuits to the two bulbs through manipulation of said finger grip.

13. A lamp comprising a casing having an interior reflecting surface, a light-carrying member mounted for sliding, non-rotating movement and pro ecting to the exterior of said casing, a finger grip rotatably mounted on said projecting end, said grip providing 7 means for sliding said member to focus the light, electric connections secured laterally to said member remote from said grip and switch means carried by said member and controlled by the rotation of the finger grip.

let. A lamp having an interior reflecting surface and an exteriorly presented housing, a light-carrying member extending from the interior to the exterior thereof con structed and arranged for longitudinal adjustment, means within said housing bearing laterally on said member to impede movement thereof and means for adjusting the impeding means to vary the pressure thereof on said member. I

15. In a reflecting electric lamp, the combination with a casing; of a reflector in front of the casing, a space intervening between the rear portions of the casing and reflector; an electric lamp bulb; a shell carrying the lamp bulb at its front and movable forwardly and rearwardly to effect focal adjustment of the bulb; a contact carrying plug within the space between the rear portions of the reflector and the casing and coupled with the shell to be movable forwardly and rearwardly therewith in the focal adjustment of the bulb and serving to supply current to the lamp, the plug also being mounted to turn with respect to the shell to cut the lamp in and out of circuit, there being engageable and separable switching contacts in the 1am circuit, one u on the plug; and a forwar ly and rearward y movable and rotatable motion transmitting element connected with and extending rear wardly from the plug and having a gripping head fixed thereto to be movable therewith wardly and rearwardly to effect focal adjustment of the bulb, said shell extending into said space between the rear portions of the reflector and the casing; a contact carrying plug received in the rear portion of said shell and coupled therewith to be movable forwardly and rearwardly therewith in the focal adjustment of the bulb and serving to supply current to the lamp, the plug also being mounted to turn with respectto the shell to cut the lamp in and out of circuit, there being engageable and separable switching contacts in the lamp circuit, one upon the plug; and a gripping head fixedly connected to the plug to be movable therewith and to transmit forward and rearward motion and rotatable motion thereto, which head is operable from the exterior of the casing to turn said plug to switch the lamp into or out of circuit and to move the plug in or out to move the shell and thereby effect focal adjustment of the bulb.

17. In a reflecting electric lamp, the com-.

bination with a casing; of a reflector in front of the casing, space intervening between the rear portions of the casing and reflector; an electric lamp bulb; a shell carrying the lamp bulb at its front and movable forwardly and rearwardly to effect focal adjustment of the bulb; a contact carrying plug within the space between the rear portions of the reflector and the casing and coupled with the shell to be movable forwardly and rear-.

wardly therewith in the focal adjustment of the bulb and serving to supply current v to the lamp, the plug also being mounted to turn with respect to the shell to cut the lamp in and out of circuit, there being engageable and separable switching contacts in the lamp circuit, one upon the plug; and a forwardly and rearwardly movable and rotatable motion transmitting element connected with and extending rearwardly from the plug and operable from the exterior of the casing to turn said plug to switch the lamp into or out of circuit and to move the plug in or out to move the shell and thereby effect focal adjustment of the bulb.

In testimony whereof, I have signed my name to this specification. 

